胸大肌 (xiōngdàjī): pectoralis major

Meanings

Wòtuī shì duànliàn xiōngdàjī de zhǔyào dòngzuò.

The bench press is the main exercise for training the pecs.

Tā de xiōngdàjī tèbié fādá.

His pecs are especially well-developed.

usage

The full anatomical name (pectoralis major). In casual gym talk people also say 胸肌 (chest muscles) for the same area.

胸 xiōng

大 dà

肌 jī